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/* vi: set sw=4 ts=4: */
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include "busybox.h"
#ifdef CONFIG_LOCALE_SUPPORT
#include <locale.h>
#endif
int been_there_done_that = 0; /* Also used in applets.c */
const char *bb_applet_name;
#ifdef CONFIG_FEATURE_INSTALLER
/*
* directory table
* this should be consistent w/ the enum, busybox.h::Location,
* or else...
*/
static const char usr_bin [] ="/usr/bin";
static const char usr_sbin[] ="/usr/sbin";
static const char* const install_dir[] = {
&usr_bin [8], /* "", equivalent to "/" for concat_path_file() */
&usr_bin [4], /* "/bin" */
&usr_sbin[4], /* "/sbin" */
usr_bin,
usr_sbin
};
/* abstract link() */
typedef int (*__link_f)(const char *, const char *);
/*
* Where in the filesystem is this busybox?
* [return]
* malloc'd string w/ full pathname of busybox's location
* NULL on failure
*/
static inline char *busybox_fullpath(void)
{
return xreadlink("/proc/self/exe");
}
/* create (sym)links for each applet */
static void install_links(const char *busybox, int use_symbolic_links)
{
__link_f Link = link;
char *fpc;
int i;
int rc;
if (use_symbolic_links)
Link = symlink;
for (i = 0; applets[i].name != NULL; i++) {
fpc = concat_path_file(
install_dir[applets[i].location], applets[i].name);
rc = Link(busybox, fpc);
if (rc!=0 && errno!=EEXIST) {
bb_perror_msg("%s", fpc);
}
free(fpc);
}
}
#endif /* CONFIG_FEATURE_INSTALLER */
int main(int argc, char **argv)
{
const char *s;
bb_applet_name = argv[0];
if (bb_applet_name[0] == '-')
bb_applet_name++;
for (s = bb_applet_name; *s != '\0';) {
if (*s++ == '/')
bb_applet_name = s;
}
#ifdef CONFIG_LOCALE_SUPPORT
#ifdef CONFIG_INIT
if(getpid()!=1) /* Do not set locale for `init' */
#endif
{
setlocale(LC_ALL, "");
}
#endif
run_applet_by_name(bb_applet_name, argc, argv);
bb_error_msg_and_die("applet not found");
}
int busybox_main(int argc, char **argv)
{
int col = 0, len, i;
#ifdef CONFIG_FEATURE_INSTALLER
/*
* This style of argument parsing doesn't scale well
* in the event that busybox starts wanting more --options.
* If someone has a cleaner approach, by all means implement it.
*/
if (argc > 1 && (strcmp(argv[1], "--install") == 0)) {
int use_symbolic_links = 0;
int rc = 0;
char *busybox;
/* to use symlinks, or not to use symlinks... */
if (argc > 2) {
if ((strcmp(argv[2], "-s") == 0)) {
use_symbolic_links = 1;
}
}
/* link */
busybox = busybox_fullpath();
if (busybox) {
install_links(busybox, use_symbolic_links);
free(busybox);
} else {
rc = 1;
}
return rc;
}
#endif /* CONFIG_FEATURE_INSTALLER */
argc--;
/* If we've already been here once, exit now */
if (been_there_done_that == 1 || argc < 1) {
const struct BB_applet *a = applets;
int output_width = 60;
#ifdef CONFIG_FEATURE_AUTOWIDTH
/* Obtain the terminal width. */
get_terminal_width_height(0, &output_width, NULL);
/* leading tab and room to wrap */
output_width -= 20;
#endif
fprintf(stderr, "%s\n\n"
"Usage: busybox [function] [arguments]...\n"
" or: [function] [arguments]...\n\n"
"\tBusyBox is a multi-call binary that combines many common Unix\n"
"\tutilities into a single executable. Most people will create a\n"
"\tlink to busybox for each function they wish to use, and BusyBox\n"
"\twill act like whatever it was invoked as.\n"
"\nCurrently defined functions:\n", bb_msg_full_version);
while (a->name != 0) {
col +=
fprintf(stderr, "%s%s", ((col == 0) ? "\t" : ", "),
(a++)->name);
if (col > output_width && a->name != 0) {
fprintf(stderr, ",\n");
col = 0;
}
}
fprintf(stderr, "\n\n");
exit(0);
}
/* Flag that we've been here already */
been_there_done_that = 1;
/* Move the command line down a notch */
/* Preserve pointers so setproctitle() works consistently */
len = argv[argc] + strlen(argv[argc]) - argv[1];
memmove(argv[0], argv[1], len);
memset(argv[0] + len, 0, argv[1] - argv[0]);
/* Fix up the argv pointers */
len = argv[1] - argv[0];
memmove(argv, argv + 1, sizeof(char *) * (argc + 1));
for (i = 0; i < argc; i++)
argv[i] -= len;
return (main(argc, argv));
}
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
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